CVE-2026-64136

In the Linux kernel, the following vulnerability has been resolved: smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() Commit 96c4af418586 ("cifs: Fix locking usage for tcon fields") refactored cifs code to change cifs_tcp_ses_lock for tc_lock around tc_count changes. There was missing lock around tc_count increment inside smb2_find_smb_sess_tcon_unlocked().

Score

CVSS 3.1 9.8 Critical

Status

Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-07-19

Last modified

2026-10-19

Weaknesses

CWE-362

Affected products

• Linux Kernel (Linux)

References

• https://git.kernel.org/stable/c/7df1df6f40c0720d30206aa35c0343b962350e0d
• https://git.kernel.org/stable/c/13fb413ae22a37c69341918a6d651d19a9b0b9b7
• https://git.kernel.org/stable/c/bf4ebdb19ff9b3cdf992b50715fe61633327416a
• https://git.kernel.org/stable/c/e374f4e496fef8168784f93a4477d67be34485fd
• https://git.kernel.org/stable/c/4d8690dace005a38e6dbde9ecce2da3ad85c7c41